?Superior Sound Quality With Balanced Armature Knowles Driver? FIIL Bluetooth headphones with custom-designed 10mm dynamic driver, provides deep bass and clear mids, while the matched Knowles balanced Armature driver reproduces delicate, natural high tones. Two types of units in this wireless in-ear headphones are combined to deliver powerful, balanced high-fidelity sound for the premium listening experience. Digital Noise Canceling Technology? FIIL digital noise canceling headphones can reduce ambient noise to enhance your audio entertainment. The headphones have an inside microphone on each earpiece that works with electronic circuitry to create an opposite sound wave to reduce waves. It reduces up to 98% ambient noise when the noise canceling circuit is switched on. Perfect for loud and noisy environments. Improve Awareness Through Monitoring Mode? FIIL digital noise reduction earphones features a unique monitoring mode, simply pressing the MFC button’s three times to enter m